AC Recharge 98 A6 2.8

Before or after you find what's leaking and repair it?

Well, the gas has to have gone 'somewhere'. Yes, it's possible there is a very slow leak and recharging will take care of it for some time, and costs considered that might be a viable way to go. If you go that route keep a close eye on the performance of the AC and if it loses the charge again, this time find out what's actually causing that loss. Sorry, I don't have a price range for you. Simple recharging shouldn't be very expensive though. I'd look for a good independant Audi specialist rather than the dealer for this kind of thing. They'll probably recommend looking for a leak when you take it in. In my opinion that's not a bad idea.

Good luck, Alan

I don't know where you are, but UK rate is in the region of £40.